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This is a PID line follower robot.I used NI-MH 7.2 V 1000 mAH for power source . And I used Analog IR sensors. By taking analog sensors values into the PID controller( Block of code) I was able to control the Motors of the robot more precisely. Since in PID we have error control techniques. Normal motor driver IC L293D only I used.
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/pid-bot-line-follower